Haselgrove J C, Moore J R
Department of Radiology, Children's Hospital of Philadelphia, PA 19104, USA.
Magn Reson Med. 1996 Dec;36(6):960-4. doi: 10.1002/mrm.1910360620.
An algorithm for correcting the distortions that occur in diffusion-weighted echo-planar images due to the strong diffusion-sensitizing gradients is presented. The dominant distortions may be considered to be only changes of scale coupled with a shear and linear translation in the phase-encoding direction. It is then possible to correct for them by using an algorithm in which each line of the image in the phase-encoding direction is considered in turn, with only one parameter (the scale) to be found by searching.
提出了一种用于校正由于强扩散敏感梯度而在扩散加权回波平面图像中出现的失真的算法。主要失真可被认为仅仅是尺度变化，再加上在相位编码方向上的剪切和线性平移。然后可以通过使用一种算法来校正这些失真，在该算法中，依次考虑相位编码方向上图像的每一行，只需通过搜索找到一个参数（尺度）。
